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spitting on cannabis seeds

2. Next, take your knife and cut through the stem, starting at the highest part of the cut. Be sure to make a clean cut right through the centre of the stem.

Most grow techniques that involve stress work on the same principles; stressing a cannabis plant encourages it to take up more nutrients, which in turn results in more vegetative growth and heavier harvests.

3. Use your knife to cut down to the lower mark you made earlier. Make sure your cut is as straight as possible. Once you reach the bottom of your cut, keep the knife stuck in the stem and use a pencil/chopstick/skewer to pry open the cut, then pull out your knife.


Stem splitting is a very aggressive grow technique that’s generating a lot of discussion in the cannabis cultivation community. Those in favour of this technique argue that it stresses the plant in a beneficial way, forcing it to take up more nutrients and produce bigger, more potent buds. Could this be true? Keep reading to find out.

To split the stems of your cannabis plant, you’ll need:

Taking a knife to your cannabis plants a few days before harvest seems pretty counterintuitive. However, many growers say stem splitting can produce bigger yields and more trichomes for tastier, more potent bud. Read on to learn more.

The theory behind stem splitting is no different. However, it’s a lot more controversial than other high-stress techniques such as topping, fimming, or super cropping. After all, taking a knife to the stems of your flowering cannabis plants is pretty hardcore.

1.) Insecticidal soap

Neem Oil will leave an unpleasant taste/smell on buds when used to treat flowering plants, so don’t let this stuff get near your buds! There’s also some evidence Neem oil may be harmful to humans so use with care! That being said, Neem oil is an all-natural remedy that is very effective against many different types of bugs and mold. You will need a mister (also called a “One-Hand Pressure Sprayer”) to spray all the leaves evenly since neem oil and water can separate easily.

Here’s a picture of an adult thrip on a finger for scale – they’re tiny!

A thrip nymph looks tubular and worm-like, unlike an aphid nymph which looks like a tiny white bug

(thrip leaf damage pics by theMallacht)

They can appear dark colored like the ones above, but also yellow, transparent or golden

Note: Most spinosad products are effective for only about 24 hours after being mixed with water, so only mix as much as you will need per application. Anything left over will be waste.

Splitting is reputed to increase the potency of marijuana and possibly boost flower production too. Hard data is difficult to come across to verify this claim. Unfortunately, all we have to confirm the effectiveness of the splitting technique is forum chatter and some YouTube vids. Albeit footage by skilled Dutch stem splitters.

The practice is believed to have given Colombian Gold its golden nugget bag appeal. By inducing senescence to increase potency and break down chlorophyll, the method helped make the strain a legend, allegedly.

Splitting cannabis plants stems doesn’t require brute force. Rather precision, preparation and the right tools for the job are de rigeur. Moreover, splitting is best suited to outdoor marijuana crops. Although, an indoor experiment can succeed following the same methodology.

Benefits Of Splitting

While the wound is still fresh and open with the blade wedged in the bottom, insert the 3 skewers to prevent it from closing. Slide out the blade and make sure your skewers are spaced out. That’s how to split the stem of a cannabis plant Dutch style.

If you are going to experiment with the splitting technique, timing is crucial. Splitting the main stem of a flowering female cannabis plant 7-10 days before harvest is the window that most growers favour. Inducing high levels of stress to force the plant to produce more resin and terpenes with a split is tricking Mother Nature. Marijuana will respond to this kind of stress negatively if you split too early.


In theory, this high-stress method works, and they are at least reporting positive results here in the Netherlands. Experiment with one cannabis plant as a test case if you are considering it.